﻿// Copyright (c) Argo Zhang (argo@163.com). All rights reserved.
// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
// Website: https://www.blazor.zone or https://argozhang.github.io/

using Microsoft.AspNetCore.Components;
using Microsoft.AspNetCore.Components.Rendering;
using Microsoft.AspNetCore.Components.Web;
using System;
using System.Diagnostics.CodeAnalysis;
using System.Threading.Tasks;

namespace BootstrapBlazor.Components
{
    /// <summary>
    /// 动态元素组件
    /// </summary>
    public class DynamicElement : BootstrapComponentBase
    {
        /// <summary>
        /// 获得/设置 TagName 属性 默认为 div
        /// </summary>
        [Parameter]
        [NotNull]
        public string? TagName { get; set; } = "div";

        /// <summary>
        /// 获得/设置 是否触发 Click 事件 默认 true
        /// </summary>
        [Parameter]
        public bool TriggerClick { get; set; } = true;

        /// <summary>
        /// 获得/设置 是否阻止默认行为 默认 false
        /// </summary>
        [Parameter]
        public bool PreventDefault { get; set; }

        /// <summary>
        /// 获得/设置 是否事件冒泡 默认为 false
        /// </summary>
        [Parameter]
        public bool StopPropagation { get; set; }

        /// <summary>
        /// 获得/设置 Click 回调委托
        /// </summary>
        [Parameter]
        public Func<Task>? OnClick { get; set; }

        /// <summary>
        /// 获得/设置 是否触发 DoubleClick 事件 默认 true
        /// </summary>
        [Parameter]
        public bool TriggerDoubleClick { get; set; } = true;

        /// <summary>
        /// 获得/设置 DoubleClick 回调委托
        /// </summary>
        [Parameter]
        public Func<Task>? OnDoubleClick { get; set; }

        /// <summary>
        /// 获得/设置 内容组件
        /// </summary>
        [Parameter]
        public RenderFragment? ChildContent { get; set; }

        /// <summary>
        /// 获得/设置 是否生成指定 Tag 元素 默认 true 生成
        /// </summary>
        [Parameter]
        public bool GenerateElement { get; set; } = true;

        /// <summary>
        /// BuildRenderTree 方法
        /// </summary>
        /// <param name="builder"></param>
        protected override void BuildRenderTree(RenderTreeBuilder builder)
        {
            if (GenerateElement || IsTriggerClick() || IsTriggerDoubleClick())
            {
                builder.OpenElement(0, TagName);
                if (AdditionalAttributes != null) builder.AddMultipleAttributes(1, AdditionalAttributes);
            }
            if (IsTriggerClick()) builder.AddAttribute(2, "onclick", EventCallback.Factory.Create<MouseEventArgs>(this, e => OnClick!()));
            if (IsTriggerDoubleClick()) builder.AddAttribute(3, "ondblclick", EventCallback.Factory.Create<MouseEventArgs>(this, e => OnDoubleClick!()));
            if (IsTriggerClick() || IsTriggerDoubleClick())
            {
                builder.AddEventPreventDefaultAttribute(4, "onclick", PreventDefault);
                builder.AddEventStopPropagationAttribute(5, "onclick", StopPropagation);
            }
            builder.AddContent(6, ChildContent);
            if (GenerateElement || IsTriggerClick() || IsTriggerDoubleClick())
            {
                builder.CloseElement();
            }

            bool IsTriggerClick() => (TriggerClick && OnClick != null) || (TriggerDoubleClick && OnDoubleClick != null);

            bool IsTriggerDoubleClick() => (TriggerDoubleClick && OnDoubleClick != null);
        }
    }
}
